JP4778368B2 - Card reader / writer, method for preventing unauthorized reading of card reader / writer, ATM device - Google Patents

Description

  The present invention relates to a card reader / writer, a method for preventing unauthorized reading of a card reader / writer, and an ATM (Automatic Teller Machine) device, and more particularly, a card reader / writer capable of preventing skimming, a method for preventing unauthorized reading of a card reader / writer, and an ATM device. About.

  Conventionally, this type of card reader / writer transports a card at a constant speed during card loading and ejection, and therefore can perform skimming to illegally read card information.

  As techniques for preventing illegal reading of card information and solving the above problems, there are the following techniques (see, for example, Patent Document 1 and Patent Document 2).

  The technique described in Patent Document 1 changes the rotation speed of the conveyance roller (including changing the rotation direction) when the card conveyance control unit pinches the card with the conveyance roller. By taking the card into the main body while being conveyed intermittently, it is possible to prevent unauthorized reading of card information even when an unauthorized card reader is attached to the front face of the insertion slot.

  The technique described in Patent Document 2 temporarily stops or reverses the magnetic card while a part of the magnetic card protrudes from the card slot when the magnetic card is taken in or ejected from the card slot. By stopping or reversing, illegal reading of magnetic card information is prevented.

Japanese Patent Laid-Open No. 2004-171205 Japanese Patent Laid-Open No. 2001-022894

  A conventional card reader / writer that takes in and discharges a card at a constant speed has a problem that skimming is performed.

  When a card insertion slot of an ATM device equipped with a card reader / writer is imitated, a general user cannot determine that a skimming device is attached, and there is a problem that card information is skimmed.

  The techniques of Patent Documents 1 and 2 both prevent unauthorized reading of card information by changing the card conveyance speed. However, each ATM device main body has only one type of change in the conveyance speed and is constant. Therefore, there is a problem that a person who is trying to perform malicious skimming can identify and identify how to change the transport speed, and may consider a new skimming technique corresponding to the change in the transport speed.

  It is an object of the present invention to provide a card reader / writer, a method for preventing unauthorized reading thereof, and an ATM device that can completely prevent skimming of card information data during card loading and discharging. For this reason, the present invention is provided with a random number generating means for generating a random number and a transport control unit for controlling the transport speed when a card corresponding to the random number is inserted or ejected, in order to solve the above-mentioned problems.

  A card reader / writer according to the present invention includes a sensor for detecting insertion or ejection of a card at the time of insertion or ejection of a card on which data is recorded, random number generating means for generating a random number based on a detection signal of the sensor, and a card corresponding to the random number. And a conveyance control unit that controls a conveyance speed at the time of insertion or discharge.

  The conveyance speed has a speed pattern including a plurality of speeds.

  The transport control unit includes a speed pattern table that stores a speed pattern for a random number, a transport speed selection unit that selects a transport speed from the speed pattern table, and a motor speed control unit that controls the speed of the transport motor. To do.

  The conveyance speed is characterized by having a speed pattern in which card data cannot be read due to jitter abnormality.

  The sensor has a light emitting means and a light receiving means.

  The data is characterized by having a magnetic stripe.

  The transport speed selecting means has means for selecting one of the generated random numbers.

  The method of preventing unauthorized reading of a card reader / writer according to the present invention includes a step of detecting insertion or ejection of a card by a sensor at the time of insertion or ejection of a card on which data is recorded, and a random number generation means by means of a detection signal of the sensor. And a step of controlling the conveyance speed at the time of insertion or ejection of the card corresponding to the random number by the conveyance control unit, the conveyance control unit storing the velocity pattern for the random number in the velocity pattern table, The method includes a step of selecting a conveyance speed from the speed pattern table by the conveyance speed selection means, and a step of controlling the speed of the conveyance motor by the motor speed control means.

  The conveyance speed has a speed pattern including a plurality of speeds.

  The conveyance speed is characterized by having a speed pattern in which card data cannot be read due to jitter abnormality.

  The sensor has a light emitting means and a light receiving means.

  The data is characterized by having a magnetic stripe.

  The conveyance speed selection means has a step of selecting one of the generated random numbers.

  The ATM device of the present invention is characterized in that a card reader / writer is mounted on a housing.

  The present invention has an effect that it is possible to completely prevent skimming of data of card information in card taking-in and discharging conveyance.

  The reason is that a random number is generated and the card conveyance control corresponding to the random number is performed.

  Next, the best mode for carrying out the present invention will be described in detail with reference to the drawings.

  FIG. 1 is a schematic configuration diagram showing an ATM apparatus 10 of the present invention, and FIG. 2 is a schematic configuration block diagram of a transport control unit 112 in FIG.

  Referring to FIG. 1, the ATM device 10 includes a housing 115 and a card reader / writer 30. The housing 115 is provided with a card insertion part 120 for inserting or ejecting the card 110. The card 110 is a cash card or a credit card having MS (magnetic stripe) data.

  The card reader / writer 30 includes a sensor 101 that detects insertion or ejection of the card 110 when the card 110 on which data is recorded is inserted or ejected, a random number generator 111, and a transport control unit 112. The random number generator 111 generates a random number based on the detection signal of the sensor 101. The transport control unit 112 controls the transport speed when the card 110 corresponding to the random number is inserted or ejected. The sensor 101 includes a light emitting unit and a light receiving unit. In FIG. 1, the state detection with the card 110 is configured such that the detection output of the light receiving means is zero, but the state detection may be reversed. At this time, the light emitting means and the light receiving means are provided in the same direction position with respect to the card 110, and the light receiving means is configured to detect the amount of light reflected from the card 110.

  Further, the card reader / writer 30 receives the control signal from the transport control unit 112, the transport motor 102 that rotates, the transport rollers 103 and 104 that transport the card 110, and the driving force of the transport motor 102 by the transport rollers 103 and 104. Drive transmission units 113 and 114 for transmitting to the head, and heads 105 and 106 for reading and writing the MS data of the card 110.

  Referring to FIG. 2, the transport control unit 112 controls the speed pattern table 121 that stores a speed pattern corresponding to a random number, the transport speed selection unit 122 that selects the transport speed from the speed pattern table 121, and the speed of the transport motor 102. Motor speed control means 123. For example, the conveyance speed has a speed pattern including a plurality of speeds as shown in FIG. 6 and repeats speed fluctuations or stops halfway so that bits 0 and 1 of the MS data of the card 110 cannot be discriminated. It has a speed pattern that cannot discriminate jitter. The speed pattern table 121 is a table in which random numbers and speed patterns have a one-to-one correspondence, and is stored in advance in a memory (not shown). In addition, although illustration is abbreviate | omitted, the conveyance speed selection means 122 selects the random number of the several generated random number, for example, Nth (N is a natural number), for example. For example, N = 3 is determined, and the third generated random number is selected from the generated random numbers. A speed pattern of the conveyance speed corresponding to the selected random number is selected from the speed pattern table 121.

  Next, the ATM device 20 in which the skimming device 107 is illegally attached to the above-described ATM device 10 will be described with reference to the drawings.

  FIG. 3 is a schematic configuration diagram showing the ATM device 20. The random number generator 111 and the conveyance control unit 112 are omitted in the drawing, and the same components as those of the ATM device 10 are denoted by the same reference numerals.

  Referring to FIG. 3, the ATM device 20 attaches a skimming device 107 simulating the card insertion part 120 of the ATM device 10 to the housing 115. Therefore, a general user of the ATM device 20 cannot determine whether or not the skimming device 107 is worn. The skimming device 107 includes heads 108 and 109 that read MS data of the card 110. Only one head 108, 109 may be provided on one side.

  Next, the operation of the ATM device 20 will be described with reference to the drawings.

  4 is a flowchart of the card 110 taking-in operation of the ATM device 20, and FIG. 5 is a flowchart of the card 110 ejecting operation of the ATM device 20.

  First, referring to FIG. 4, the customer inserts the card 110 into the card insertion slot 116 of the ATM device 20. The sensor 101 detects that the card 110 has been inserted when the amount of received light changes from light to dark (the light emitted from the light-emitting means is shielded by the card 110, and the light-receiving means changes to zero). (S11).

  When the insertion of the card 110 is detected by the sensor 101, the random number generation device 111 generates a random number (S12).

  Note that a detection signal identification unit (not shown) determines whether the detection signal of the sensor 101 has changed from light to dark, or conversely, whether the detection signal has changed from dark to light. Further, the detection signal identification means sends a detection signal to the random number generator 111 when changing from light to dark, and sends a detection signal to the transport control unit 112 when changing from dark to light.

  The random number generator 111 sends a random number to the transport control unit 112. The transport control unit 112 selects a speed pattern corresponding to the random number from the speed pattern table 121 by the transport speed selection unit 122 (S13).

  The motor speed control means 123 drives and controls the carry motor 102 according to the selected speed pattern, and takes the card 110 into the card reader / writer 30 (S14).

  Here, drive control of the transport motor 102 (transport speed control of the card 110) will be described based on FIG. 6 showing an example of a speed pattern.

  Referring to FIG. 6, the speed pattern is displayed with the vertical axis representing speed and the horizontal axis representing time. First, the transport control unit 112 transports the card 110 at the speed v1 until time t1, and does not transport (stop) from time t1 to t2. Conveyance is performed at a speed v1 from time t2, and a speed v4 is set at time t3. No conveyance is performed from time t4 to time t5. From time t5 to time t6, transport is performed at speed v3, from time t6 to time t7 is transported at speed v2, and from time t7 is transported at speed v4.

  The speed pattern may be displayed with the vertical axis representing the frequency of the conveyance motor 102 and the horizontal axis representing the number of steps, and driving the conveyance motor 102 may be controlled.

  For example, the speed pattern may be a pattern in which bits 0 and 1 of MS data that cause jitter abnormality cannot be distinguished.

  Next, as shown in FIG. 3, after taking the card 110 with the above speed pattern, the sensor 101 changes from dark to bright (there is no card 110 that blocks light emission, and the light receiving means is Is detected), it is detected that the card 110 is completely taken into the card reader / writer 30 (S15).

  Referring to FIG. 7, when the sensor 101 detects that the card 110 is completely taken into the card reader / writer 30, the transport control unit 112 performs control to transport the card 110 at a constant transport speed (S16).

  The heads 105 and 106 built in the card reader / writer 30 can read the MS data normally (S17).

  Next, the card 110 ejection operation of the ATM device 20 will be described with reference to the drawings.

  5 and 8, when the card 110 is ejected, the detection signal of the sensor 101 changes from light to dark, and it is detected that the card 110 has been transported to the ejection position (S21).

  When the ejection of the card 110 is detected by the sensor 101, the random number generation device 111 generates a random number (S22).

  The random number generator 111 sends a random number to the transport control unit 112. The transport control unit 112 selects a speed pattern corresponding to the random number from the speed pattern table 121 by the transport speed selection unit 122 (S23).

  The motor speed control means 123 drives and controls the carry motor 102 according to the selected speed pattern, and discharges the card 110 out of the card reader / writer 30 (S24).

  As described above, the ATM device 20 generates a random number and performs transport control of the card 110 corresponding to the random number. It is impossible for a human to elucidate and specify how the conveyance speed is changed by the conveyance control. Accordingly, the ATM device 20 has an effect that the skimming of the card 110 information can be completely prevented in the card 110 taking-in and discharging conveyance.

It is a schematic block diagram which shows the ATM apparatus of this invention. It is a schematic block diagram of the conveyance control part in FIG. It is a schematic block diagram which shows the ATM apparatus of this invention. It is a flowchart of the card | curd taking-in operation | movement of the ATM apparatus of this invention. It is a flowchart of the card | curd discharge operation | movement of the ATM apparatus of this invention. It is a figure which shows an example of a speed pattern. It is a figure which shows the state which took in the card | curd completely in the card reader / writer. It is a figure which shows the state which discharges | emits a card | curd from a card reader / writer.

Explanation of symbols

DESCRIPTION OF SYMBOLS 10 ATM apparatus 20 ATM apparatus 30 Card reader / writer 101 Sensor 102 Conveyance motor 103, 104 Conveyance roller 105, 106 Head 107 Skimming apparatus 108, 109 Head 110 Card 111 Random number generator 112 Conveyance control part 113, 114 Drive transmission part 115 Case 116 Card insertion slot 120 Card insertion section 121 Speed pattern table 122 Transport speed selection means 123 Motor speed control means

Claims (12)

A sensor for detecting insertion or ejection of the card at the time of insertion or ejection of a card on which data is recorded, random number generating means for generating a random number based on a detection signal of the sensor, and insertion or ejection of the card corresponding to the random number A conveyance control unit that controls the conveyance speed at the time,
The card reader / writer is characterized in that the transport speed has a speed pattern including a plurality of speeds, and the transport control unit selects the speed pattern corresponding to the random number . The transport control unit includes a speed pattern table that stores a speed pattern for the random number, a transport speed selection unit that selects the transport speed from the speed pattern table, and a motor speed control unit that controls the speed of the transport motor. The card reader / writer according to claim 1. 3. The card reader / writer according to claim 1, wherein the conveyance speed has the speed pattern in which the data of the card cannot be read due to jitter abnormality. 2. The card reader / writer according to claim 1, wherein the sensor includes a light emitting unit and a light receiving unit. 4. The card reader / writer according to claim 1, wherein the data has a magnetic stripe. 3. The card reader / writer according to claim 2, wherein the transport speed selecting means includes means for selecting one of the generated random numbers. A step of detecting insertion or ejection of the card at the time of insertion or ejection of a card in which data is recorded, a step of generating a random number by a random number generation means according to a detection signal of the sensor, and a step of And a step of controlling a conveyance speed at the time of insertion or discharge by a conveyance control unit, the conveyance control unit storing a speed pattern for the random number in a velocity pattern table, and the velocity by the conveyance speed selection means Selecting the speed pattern corresponding to the random number from a pattern table, and controlling the speed of the transport motor by motor speed control means,
The method of preventing unauthorized reading of a card reader / writer, wherein the transport speed has the speed pattern including a plurality of speeds. 8. The method of preventing unauthorized reading of a card reader / writer according to claim 7, wherein the transport speed has the speed pattern in which the data of the card cannot be read due to jitter abnormality. 8. The method of preventing unauthorized reading of a card reader / writer according to claim 7, wherein the sensor includes a light emitting means and a light receiving means. 9. The method of preventing unauthorized reading of a card reader / writer according to claim 7, wherein the data has a magnetic stripe. 8. The method of preventing unauthorized reading of a card reader / writer according to claim 7, wherein the transport speed selecting means includes a step of selecting one of the generated random numbers. An ATM device comprising the card reader / writer according to claim 1 mounted in a housing.

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